3D cover for bearing

Protection and precision for your bearings with the Sloting Plus 3D Cap

In competitive slot racing, the small details make the difference between a car that runs smoothly and one that loses efficiency under pressure. The 3D Cap for bearing SP399920 from Sloting Plus is one of those details: a component manufactured using 3D printing in high-resistance technical plastic, designed to secure and protect the bearing in its housing, preventing unwanted movement during competition.

Function and performance

The bearing is one of the most critical elements of a slot car's rear end. Without proper retention, it can suffer micro-movements under intense acceleration or sudden direction changes, resulting in loss of alignment, vibrations, and premature wear. This cap acts as a retention and sealing element, ensuring that the bearing remains exactly where it should be at all times.

• Reference: SP399920
• Material: High-resistance technical plastic, manufactured using 3D printing
• Contents: 2 3D caps for bearings + complete screws for assembly (metric screws and set screws)
• Compatibility: Universal for most motor mounts compatible with Sloting Plus

Compatibility and assembly

Designed to fit most motor mounts in the Sloting Plus range, its installation is straightforward and requires no additional modifications. The kit includes all necessary screws — metric screws and set screws — so you can install it without needing to source additional materials. The dimensional precision of 3D printing ensures a firm and repeatable fit, ideal for both quick setups in the pits and more elaborate assemblies on the workbench.

Assembly and preparation

The installation process is simple:

1. Place the bearing in its housing on the motor mount.
2. Position the 3D cap over the bearing.
3. Secure with the included screws and set screws, tightening with the appropriate tool without over-tightening to avoid compromising the free rotation of the axle.

We recommend checking the alignment of the rear axle after assembly and before the first track test, especially if the bearing has been replaced at the same time.

Common mistakes

• Over-tightening the screws: this can deform the housing or create friction on the bearing. Adjust firmly, not forcefully.
• Not checking alignment: although the cap centres the bearing, it is always advisable to check the parallelism of the axle with the chassis before competing.
• Reusing damaged screws: if the included screws show signs of wear on the head or thread, replace them to ensure a secure fastening.

Frequently asked questions

Which motor mounts is this cap compatible with?

According to Sloting Plus specifications, it is compatible with most of their motor mounts. If you have questions about a specific mount from another brand, we recommend checking the dimensions of the bearing housing before placing your order.

How many caps does the kit include?

The kit includes 2 3D caps for bearings, along with all the necessary screws for the assembly of both.

Is the screw hardware included or do I need to purchase it separately?

It is included in the kit: metric screws and set screws, everything needed for assembly without additional purchases.

Can I use these caps in an inline or sidewinder setup?

The cap acts on the rear axle bearing regardless of the motor configuration. It is compatible with different types of setups as long as the mount used is from the Sloting Plus range.

Does the technical plastic used in 3D printing withstand the heat generated during competition?

The technical plastic used by Sloting Plus in their 3D printed parts is selected to withstand the usual conditions of competitive slot racing. Nevertheless, as with any plastic part, it is advisable to periodically check its condition if the car undergoes intensive and prolonged running sessions.

Is it necessary to apply any lubricant when installing the cap?

The cap itself does not require lubrication. The lubricant, if applicable, should be applied to the bearing and axle, not on the cap.

The Sloting Plus SP399920 3D bearing cap is a precision-engineered replacement part for 1/32 slot car rear axle setups. Made from high-resistance technical plastic via 3D printing, it secures the bearing in its housing, preventing unwanted movement under hard acceleration. The kit includes 2 caps and all necessary screws for installation. Compatible with most Sloting Plus motor mounts, it's an essential maintenance and tuning component for club racers and competitive slot car enthusiasts looking for reliable, repeatable performance on track.